Novel poly(3-hydroxybutyrate) nanocomposites containing WS2 inorganic nanotubes with improved thermal, mechanical and tribological properties

Naffakh Cherradi Hadi, Mohammed and Marco, Carlos and Ellis, Gary J. and Cohen, Sidney R. and Laikhtman, Alexander and Rapoport, Lev and Zak, Alla (2014). Novel poly(3-hydroxybutyrate) nanocomposites containing WS2 inorganic nanotubes with improved thermal, mechanical and tribological properties. "Materials Chemistry and Physics", v. 147 (n. 1-2); pp. 273-284. ISSN 0254-0584. https://doi.org/10.1016/j.matchemphys.2014.04.040.

Description

Title: Novel poly(3-hydroxybutyrate) nanocomposites containing WS2 inorganic nanotubes with improved thermal, mechanical and tribological properties
Author/s:
  • Naffakh Cherradi Hadi, Mohammed
  • Marco, Carlos
  • Ellis, Gary J.
  • Cohen, Sidney R.
  • Laikhtman, Alexander
  • Rapoport, Lev
  • Zak, Alla
Item Type: Article
Título de Revista/Publicación: Materials Chemistry and Physics
Date: 15 September 2014
ISSN: 0254-0584
Volume: 147
Subjects:
Freetext Keywords: Composite materials; Nanostructures; Thermal properties; Mechanical properties; Tribology
Faculty: E.T.S.I. Industriales (UPM)
Department: Física Aplicada e Ingeniería de Materiales
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Poly(3-hydroxybutyrate) (PHB) nanocomposites containing environmentally-friendly tungsten disulphide inorganic nanotubes (INTeWS2) have been successfully prepared by a simple solution blending method. The dynamic and isothermal crystallization studies by differential scanning calorimetry (DSC) demonstrated that the INTeWS2 exhibits much more prominent nucleation activity on the crystallization of PHB than specific nucleating agents or other nanoscale fillers. Both crystallization rate and crystallinity significantly increase in the nanocomposites compared to neat PHB. These changes occur without modifying the crystalline structure of PHB in the nanocomposites, as shown by wide-angle X-ray diffraction (WAXS) and infrared/Raman spectroscopy. Other parameters such as the Avrami exponent, the equilibrium melting temperature, global rate constant and the fold surface free energy of PHB chains in the nanocomposites were obtained from the calorimetric data in order to determine the influence of the INTeWS2 filler. The addition of INTeWS2 remarkably influences the energetics and kinetics of nucleation and growth of PHB, reducing the fold surface free energy by up to 20%. Furthermore, these nanocomposites also show an improvement in both tribological and mechanical (hardness and modulus) properties with respect to pure PHB evidenced by friction and nanoindentation tests, which is of important potential interest for industrial and medical applications.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainMAT-2010-21070-C02-01MINECOUnspecifiedUnspecified

More information

Item ID: 37462
DC Identifier: http://oa.upm.es/37462/
OAI Identifier: oai:oa.upm.es:37462
DOI: 10.1016/j.matchemphys.2014.04.040
Official URL: http://www.sciencedirect.com/science/article/pii/S025405841400296X
Deposited by: Memoria Investigacion
Deposited on: 10 Feb 2016 17:30
Last Modified: 15 Sep 2016 22:30
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